Traverse mechanism for rayon spinning machines



y 4, 1934. c. o. HERSAM TRAVERSE MECHANISM FOR RAYON SPINNING MACHINES Filed Dec. 9, 1932 3 Sheets-Sheet l \\\\\\\\\\\\\\\\\\\\\\\\\\\\yylllllliifi1& k\\\\\\\\\\\\\\\\\\\\\\\y C. O HERSAM Jul 24, 1934.

TRAVERSE MECHANISM FOR RAYON SPINNING MACHINES 'Filed Dec. 9, 1932 3 Sheets-Sheet 2 C. O. HERSAM July 24, 1934.

TRAVERSE MECHANISM FOR RAYON SPINNING MACHINES Filed. Dec. 9, 1932 3 Sheets-Sheet 5 C M0 Giff/6mm 0212; M

Wang

Patented July 24, 1934 UNITED STATES PATENT OFFICE Conrad O. Hersam, Detroit, Mich, assignor to The Wicaco Machine Corporation, Philadelphia,

Pa., a corporation of Pennsylvania Application December 9, 1932, Serial No. 646,560

3 Claims. (01. 242-43) My invention relates to new and useful improvements in spinning machines, and more particularly to the manner of operating the traverse of a pot type rayon spinning machine and a bobbin type spinning machine.

As is well known, pot type rayon spinning machines are provided with a traverse which has a vertical movement, so that the thread, when being built up in the pot, will be in the form of a cake, after which the cake is placed in a centrifugal. washing machine and the liquid which is inserted at the center of the cake will pass out through the cake, and wash the same.

One of the objects of the invention is to provide a traverse therefor that may operate at a relatively high speed. so that the weaving of the cake will be of a more open nature, thus allowing the water to pass more rapidly through the cake when the'same is washed in a centrifugal machine.

Still another object of the invention is to provide a traverse for a pot type rayon spinning machine, wherein the traverse may operate at a relatively high rate of speed and still not be subjected to the usual harmful whip, which is so likely to occur in the long traverse shafts of the machine. When the reversing moment occurs, this whip often does cause considerable damage to the threads that are being formed into cakes within the pots.

Still another object of the invention is to provide a traverse mechanism for a pot type spinning machine wherein certain forms of gears and cams are used, as will be shortly explained, so that the shock usually caused by the rollers of thetraverse passing over the high and low points of the cam is entirely done away with.

Still another objectof the invention is to provide a traverse of a pot type spinning machine which consists in changing the pitch of a heartshaped cam so that when rollers pass over the high and low points of the heart-shaped cam, they will not be subjected to the ordinary shock, while to compensate for the change in the pitch of the cam 21'. pair of elliptical drive gears are provided and so timed with the cams that the speed of the cam shaft is proportionately increased at the time the rollers pass over the high and low points to thus maintain a uniform traverse' speed.-

Still" another object of the invention is to provide a traverse for spinning machines that will maintain a uniform speed and, at the same time, may be run at a high rate of speed without causing any whip in the long traverse shaft or cause any shock when the rollers that support the traverse bars of the traverse pass over the high and low points of the cam.

Still another object of the invention is to provide a form of traverse for a pot type spinning machine that may be successfully run at a rate as high as sixty strokes a minute without any shock to the traverse or to the threads, the ordinary speed as used today being only fifteen to sixteen strokes a minute.

With these and other obj ects in view, the invention consists in certain new and novel arrangements and combination of parts, as will be hereinafter more fully explained and pointed out in the claims.

Referring now to the drawings showing a preferred embodiment of a pot type and bobbin typ'e spinning machine,

Fig. l is a vertical section of a pot type rayon spinning machine, the length of travel of the traverse being shown in dotted lines;

Fig. 2 is a fragmentary side elevation of one end of the machine showing the arrangement for providing a" uniform rate of speed to the traverse bar, many parts being omitted for the sake of clearness;

Fig. 3 is a similar top plan view of the same;

Fig. 4 is a fragmentary end view of the machine showing the arrangement of the elliptical gears and the cam and roller arrangement for operating the traverse bars;

Fig. 5 is a detail diagrammatic view of the elliptical gear and its compensating cam and the roller arm that elevates and lowers the traverse bars, the nose of the cam being at its highest point;

Fig. dis a similar view with the cam partly revolved;

Fig. l is a similar View with the roller now bearing on the low point of the cam;

Fig. 8 is a fragmentary detail of the arm and roller that support the traverse bars.

Referring now more particularly to the several views and to Fig. l for the moment, there is shown a pot spinning machine which, of course, may be of any desired length, as it is made up of a plurality of like sections, each section having eighteen pots, nine to the side.

It will be understood too at the outset that there is a row of pots, pumps, troughs, etc. on opposite sides of the machine and that the one side is merely a duplicate of the other and, therefore, only one set of these duplicate parts will be mentioned.

As will benoti'ced', there is the standard or base I from which extends the bracket 2, from which runs a shaft 3 which, in turn, operates the usual pumps 4. There may also be seen the trough 5 while mounted slightly above this trough 5 is one of the pots 6. As is well known, these pots spin 5 at a very high rate of speed, to wit, six thousand r.p.m., so that when the thread is fed into the respective pots the centrifugal force will wind the thread into a cake, after which the cake is generally placed in a centrifugal washing machine to cause the washing liquid to be forced through the same and thus cleanse it. It might be mentioned that the thread is twisted two and one-half turns to the inch at the same time it is spun.

It will also be understood that although I have shown only one pot on each side of the machine, there are generally nine or more to each section of the machine, and the machine then made up of a plurality of sections. a I

, Located centrally of the pot is the funnel'7 through which is fed the thread 3 which, in turn,

has just left the godet wheel 9.

It will be understood that I have not shown or gone into the explanation of the manner of revolving the pots or the other movements of the 5 machine, as for the purpose of the present invention it is only necessary to show and describe enough of the machine to illustrate the manner in which the traverse is operated.

Referring now for the moment to Fig. 2, there will also be seen the forward plate or standard 10 of the machine, on the outer end of which is a bracket 11 through which extend shafts and stub shafts, now about to be described.

Near the top of the machine is the main drive shaft 12 which is to be operated by a motor (not shown) at the other end of the machine. On the outer end of this shaft 12 is mounted the small pinion 13 which, in turn, meshes with the large gear 14 which, in turn, is mounted on a small stub shaft 15. To the rear of this gear 14 and also mounted on the stub shaft 15 is one of two elliptical gears 16 which, in turn, meshes with the elliptical gear 1'7 mounted on the end of the driven or traverse operating shaft 18, which 5. shaft'willextend the entire length of the machine.

At intervals along the power shaft 12are the gears 19. to drive the bevel gears 20 which, in turn, drive the godet wheels 9.

Still referring for the moment to Fig. 2, there will be seen another standard 21 similar to the standard 10 and on this standard there will be seen the bracket 22, on one end of which is formed the bushing 23, while a like bushing 24 is at the other end of the bracket.

' It will be understood that these brackets are spaced along the length of the machine and are positioned so that each section of the machine will have a bracket for holding the vertical supports for the traverse bars, about to be mentioned.

It might be here mentioned that in Figs. 2 and 3, a section of the machine comprises the parts between the standard 10 and the standard 22.

Likewise on the standard 10 there will be seen 5' a bracket 25 with a bearing 26 therein, and it will be understood that the supports for the traverse bars will be guided within these two bearings. The traverse bars also extend throughout the length of eachsection of the machine and a like traverse bar .will be supplied for each and every section, all. of which traverse bars, however, are operated by the one traverse drive shaft 18, as will be readily understood. 7

Along the shaft 18 are provided the cams 27,

.75 there being two to each section, as it is these cams that cause the raising and lowering of the traverse supports 28, which travel in the bearings 23 and 26 and which, in turn, carry the traverse bars 29.

In Fig. 1, there may be seen the adjustable funnel brackets 30 that are, in turn, carried by the traverse bars 29 and at the outer end of each bracket is the funnel '7, as aforementioned- Now each traverse supporting rod 28 is pivotally secured at its upper end to one end 31 of a lever arm 32 which is provided centrally with a roller 33 and at its other end with the opening 34 for pivotal mounting, as at 35, to the machine frame (see Fig. 2). 7

Referring for the moment to Fig. 8, while the bracket arm 32 is shown in detail, it will be noticed that it is slightly offset from its center, so that it may bridge the cam and allow for the positioning of a further similar arm 36 (see Fig. 2)

which is oppositely mounted, that is, its one end is pivoted, as at 3'7, to the machine frame and its opposite end is connected to a traverserod support located on the far sideof the machine. (Fig. 2). In other words, as may be seen in Fig; 2, there are two of these arms for every cam, one of which elevates the traverse bar on the one side of the machine and the other of which operates the traverse bar on the opposite side of the machine.

As heretofore mentioned, there are two arms to each cam roller or, in other words, four arms to each section of the machine, so that the. two traverse bars 29 will be raised evenly at their opposite ends.

Now to provide against any whip in the traverse bars 29 and permit them to travel at a relatively high rate of speed, I have formed the cams 27 of a certain shape, as may be more clearly seen in Figs. 5 to 7.

Referring for the moment to Figs. 5 to '7, I have shown, for the purpose of simplicity of illustration, only one bracket arm 32 together with a cam and the gears about to be mentioned, these different figures showing the one-half cycle of the gears and the vertical swing of the bracket arm to, in turn, operate the traverse bar, as will b understood.

It will also be seen .that the cam roller 27 has its nose 2'7 somewhat flattened, that is, with respect to an ordinary heart-shaped cam, and likewise it will be seen that the heel 27" has also 125 been somewhat flattened so that in the cams rotation there will be little or no shock or jar to the roller 33 and its arm 32 when the nose or heel of the cam is in contact with the roller of the arm.

To allow, however, for this changing of the pitch of the cam 2'7, I have provided a pair of elliptical gears 16 and'1'7 and arranged them to exactly compensate for this difference;

As may be also seen in Fig. 5, when the nose of the cam is in its uppermost position, the e1lipti-' cal gears will be in the position shown in Fig. 5, and due, of course, to the different diameters of the elliptical gears the driven gear 1'7 will travel at a greater rate of speed when it is in the position shown in Fig. 5 than it will when in the position shown in Fig. 6, as, in reality, we have the effect of a small gear driving a large gear. Therefore, by utilizing a heart-shaped cam whose pitch has been changed, together with a pair of elliptical gears that compensates for the change, a uniform rate of speed for the traverse drive shaft 18 is obtained, and the traverse bar 29 through its guide rods 28 will rise and fall at a uniform rate of speed and be free from the shock incident to the use of an ordinary heartshaped cam, if the traverse rod were driven at a high rate of speed.

In fact, it has been found with one of these machines in actual service that the traverse may be speeded up to sixty strokes a minute rather than at the usual fifteen or sixteen a minute, and

still the traverse rod will be free from shocks and the traverse bars 29 free from the whip which always occurs when other forms of traverse mechanisms are utilized.

Thus, it will be seen that I have provided a traverse mechanism wherein the driven traverse shaft rotates at an uneven speed, but this, in turn, is compensated for by the use of special shaped cams that have had their pitch arranged so that the traverse bars supported from the brackets are operated at a uniform or constant speed.

I have found in actual use that by building this traverse mechanism as above outlined, the traverse may be operated at a relatively high rate of speed, in fact as high as sixty strokes a minute which, in turn, will allow the thread to be spun in the pot in a much more open wave than heretofore found possible which, in turn, allows the cake to be more readily and quickly washed.

I have not gone into a detailed explanation of the entire machine, as it is only the arrangement of the traverse that is of especial interest in the present application.

It goes without saying that any jar or stretching of the rayon threads as they leave the acid bath would affect their dernier or break them or, in other words, cause imperfect threads which would have to be rejected.

Again, the winding will be uniform so that when the cakes are unwound for skeining, there is no trouble from uneven windings, tangles or breaks.

From the foregoing, it will be seen that I have arranged a traverse operation and construction that may be applied to a pot type spinning machine, sothat the funnels will properly deliver the thread to the pot and at a relatively high rate of speed so as to provide a cake of open Winding.

I have also provided a traverse that may be changed slightly and be operated on a bobbin type spinning machine, the gist of the invention being to provide elliptical gears to, in turn, drive a shaft on which are located cams that may have their respective noses and heels so flattened out that there will be no jar to the parts that operates the traverse bars, as the high and low points of the cams contact with said parts, thus allowing the traverse to be driven at a relatively high rate of speed without in any way affecting the rayon threads.

In both instances, the cake is wound with an open weave, so that when the cake is, in turn, placed in a centrifugal drier, the same may be more quickly washed.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:-

1. A spinning machine made up of a plurality of sections, each section having a traverse bar on its opposite sides, a driven shaft located between said traverse bars and oppositely pivoted bracket arms extending over said shaft, rollers centrally of said bracket arms, cams on said driven shaft and in contact with the rollers on said arms, means for driving the driven shaft at a varying rate of speed during each revolution, and the cams being shaped to compensate for the different speeds of the driven shaft whereby the traverse bars are elevated and lowered in an even manner.

2. A spinning machine comprising driving and driven shafts, means connecting the shafts to cause the driven shaft to travel at varying speeds throughout each revolution, oppositely pivoted adjacent arms extending transversely of the driven shaft, a cam on the driven shaft beneath said arms contacting the same, a traverse mechanism pivotally connected to each arm, the cam being shaped to compensate for the varying rate of speed of the driven shaft and arranged to raise and lower the traverse mechanisms simultaneously in unison at a constant rate of speed.

3. A spinning machine comprising driving and driven shafts, a cam having a relatively flat nose and heel secured to the driven shaft, bracket arms pivotally and oppositely secured to the machine and extending in substantially parallel relationship across and resting upon said cam, traverse mechanisms pivoted to said bracket arms, a pair of meshing elliptical gears connecting the driving and the driven shafts whereby the latter rotates at a varying rate of speed, said gears being arranged to compensate for the change of pitch occasioned by the shape of the cam and thus causing the traverse mechanisms simultaneously to be raised and lowered at a constant rate of speed and in unison.

. CONRAD O. HERSAM. 

